23166305255503 has 4 divisors (see below), whose sum is σ = 24529029094080. Its totient is φ = 21803581416928.

The previous prime is 23166305255477. The next prime is 23166305255519. The reversal of 23166305255503 is 30555250366132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23166305255503 is a prime.

It is a super-2 number, since 2×23166305255503² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23166305255543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681361919263 + ... + 681361919296.

It is an arithmetic number, because the mean of its divisors is an integer number (6132257273520).

Almost surely, 2^{23166305255503} is an apocalyptic number.

23166305255503 is a deficient number, since it is larger than the sum of its proper divisors (1362723838577).

23166305255503 is a wasteful number, since it uses less digits than its factorization.

23166305255503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362723838576.

The product of its (nonzero) digits is 2430000, while the sum is 46.

The spelling of 23166305255503 in words is "twenty-three trillion, one hundred sixty-six billion, three hundred five million, two hundred fifty-five thousand, five hundred three".